Waterproof card holder and metal casing

ABSTRACT

A waterproof card holder includes a card holder frame, a cover plate, a sleeve integrated with and extending from an inside of the cover plate, and a waterproof mechanism in the sleeve. A through-hole of the sleeve penetrates through the sleeve and cover plate. The waterproof mechanism includes a first end portion limited inside the sleeve, a second end portion having an outer diameter smaller than that of the first end portion, and a waterproof ring sleeved on a periphery of the first end portion and forming a sliding sealing structure with the sleeve. The sleeve includes first and second openings respectively disposed at two ends of a sleeve body. The first end portion is limited to be only movable within a stroke between the first and second openings. The second end portion being capable of passing through a first opening to be in contact with a card retracting mechanism.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. patent applicationSer. No. 16/348,956, filed on May 10, 2019, which is the U.S. NationalStage Application of International Application No. PCT/CN2018/088202,filed on May 24, 2018, which claims priority to Chinese PatentApplication No. 201710477581.1, filed on Jun. 21, 2017, and ChinesePatent Application No. 201710542188.6, filed on Jul. 5, 2017. Thedisclosure of all of the aforementioned patent applications are herebyincorporated by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the technical field of waterproofdesign of a mobile terminal, and particularly, to a waterproof cardholder and a metal casing.

BACKGROUND

An electronic card seat of a smart phone is generally used to carry apersonal identification card, a memory card, and the like. However, dueto factors relating to a service operator or personal preference, theexisting card seat is required to allow placing and taking theelectronic card from the outside, and a special structure of the cardseat causes difficulty in waterproof design.

The existing card seat generally includes a drawer seat for carrying anelectronic card. The drawer seat has a tail portion provided with acover plate configured to fit in a frame side of a mobile phone. Thecover plate is provided with a small hole, into which a needle is to beinserted for retracting the card. Another side of the small hole is anend of a push rod of a card release mechanism of the card seat. Thesmall hole cannot be blocked, which otherwise causes the difficulty inthe waterproof design.

SUMMARY

In view of above, the present disclosure provides a waterproof cardholder, a card seat, a metal casing and a mobile terminal, aiming tosolve the waterproof problem of a mobile terminal such as a mobile phoneor a tablet computer.

In order to solve the above technical problem, the present disclosureprovides a technical solution. The present disclosure provides awaterproof card holder, including a card holder frame, and a cover platelocated at top of the card holder frame. The waterproof card holderfurther includes a sleeve integrated with and extending from an innerside of the cover plate and a through-hole penetrating through thesleeve and the cover plate. A waterproof mechanism is accommodated inthe sleeve, and the waterproof mechanism includes a main body, a firstend portion located inside the sleeve, a second end portion protrudingfrom the sleeve, and a waterproof ring located on a periphery of themain body and close to the first end portion. The waterproof ring andthe sleeve form a sliding sealing structure therebetween. A waterproofcircle is disposed on a periphery of the cover plate, and the waterproofcircle and an inner side wall of a slot of a metal casing form a sealingstructure therebetween.

In an example embodiment, the main body of the waterproof mechanism hasan outer diameter smaller than an inner diameter of the sleeve; and in astate when a card is inserted, the main body of the waterproof mechanismis completely accommodated in the sleeve, and the second end portion isblocked to be outside the sleeve.

In an example embodiment, the second end portion has an outer diametergreater than the inner diameter of the sleeve, and a part of the firstend portion has an outer diameter equal to the inner diameter of thesleeve.

In an example embodiment, a recess is formed in an outer end of thefirst end portion for position fixing of a card-retracting needle andbeing abutted against the card-retracting needle.

In an example embodiment, the waterproof card holder or the cover plateis manufactured by a CNC process or a powder metallurgy process.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides awaterproof card holder, including a card holder frame, and a cover platelocated at top of the card holder frame. The waterproof card holderfurther includes a sleeve integrated with and extending from an innerside of the cover plate and a through-hole penetrating through thesleeve and the cover plate. A waterproof mechanism is accommodated inthe sleeve, and the waterproof mechanism includes a first end portionlimited to be inside the sleeve, a second end portion having an outerdiameter smaller than that of the first end portion, and a waterproofring sleeved on a periphery of the first end portion. The waterproofring and the sleeve form a sliding sealing structure therebetween. Thesleeve includes a sleeve body, a first opening and a second opening. Thefirst opening and the second opening are disposed at two ends of thesleeve body, respectively. The first end portion is limited to be onlymovable within a stroke between the first opening and the secondopening. The second end portion is capable of passing through the firstopening to be in contact with a card retracting mechanism.

In an example embodiment, a waterproof circle is disposed on a peripheryof the cover plate, and the waterproof circle and an inner side wall ofa slot of a metal casing form a sealing structure.

In an example embodiment, the first opening has an inner diametersmaller than an outer diameter of the first end portion.

In an example embodiment, a first blocking slope is formed at a junctionbetween the first end portion and the second end portion, and a secondblocking slope, corresponding to and cooperating with the first blockingslope, is formed on a side of the first opening facing the secondopening.

In an example embodiment, the waterproof mechanism is inserted from thesecond opening of the sleeve, and once the sleeve is inserted, anopen-ring metal elastic member having an inner diameter smaller than anouter diameter of the first end portion is clipped in the secondopening, or the second opening is stamped in such a manner that theinner diameter of the second opening becomes smaller and is smaller thanthe outer diameter of the first end portion.

In an example embodiment, the waterproof mechanism is inserted from thesecond opening of the sleeve, and once the sleeve is inserted, anopen-ring metal elastic member having an inner diameter smaller than anouter diameter of the first end portion is fitted in the second opening,or the second opening is stamped in such a manner that the innerdiameter of the second opening is smaller than the outer diameter of thefirst end portion.

In an example embodiment, the second opening has an inner diametersmaller than an outer diameter of the first end portion, the waterproofmechanism is inserted from the first opening of the sleeve, and once thesleeve is inserted, the first opening is pressed towards a circle centerin such a manner that an inner diameter of the first opening is smallerthan the outer diameter of the first end portion.

In an example embodiment, the second opening has an inner diametersmaller than an outer diameter of the first end portion, the waterproofmechanism is inserted from the first opening of the sleeve, and once thesleeve is inserted, an open-ring metal elastic member having an innerdiameter smaller than an outer diameter of the first end portion isriveted in the first opening.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides acard seat using the waterproof card holder described above. The cardseat incudes a terminal module, a metal casing, and a card retractingmechanism. The card holder is configured to carry an electronic card andmove between the metal casing and the terminal module. The cardretracting mechanism incudes a push rod mounted on a lateral side of thecard seat. The second end portion of the waterproof mechanism cooperateswith an end portion of the push rod.

In an example embodiment, a protrusion is formed at an end surface ofthe second end portion of the waterproof mechanism, and a groovecorresponding to the protrusion is provided in an end surface of the endportion of the push rod, so as to achieve position fixing of thewaterproof mechanism and the push rod, thereby preventing an appliedforce from being skewed.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides amobile terminal, including the above waterproof card seat.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides ametal casing, including a frame portion, a slot penetrating through theframe portion, and a sleeve integrated with and extending from an innerside of the frame portion. A card holder for an electric card being tobe inserted through the slot. The sleeve is hollow to form athrough-hole penetrating through the frame portion, a waterproofmechanism is accommodated in the sleeve, and the waterproof mechanismincludes a main body, a first end portion accommodated inside thesleeve, a second end portion opposite to the first end portion, and awaterproof ring located on a periphery of the main body and close to thefirst end portion. The waterproof ring and an inner wall of the sleeveform a sealing structure, and the waterproof mechanism is movable bybeing pushed in an extending direction of the sleeve.

In an example embodiment, the main body of the waterproof mechanism hasan outer diameter smaller than an inner diameter of the sleeve; and in astate when a card is inserted, the main body of the waterproof mechanismis completely accommodated in the sleeve, and the second end portion isblocked to be outside the sleeve.

In an example embodiment, the second end portion has an outer diametergreater than the inner diameter of the sleeve, and a part of the firstend portion has an outer diameter equal to the inner diameter of thesleeve.

In an example embodiment, a recess is formed in an outer end of thefirst end portion for position fixing of a card-retracting needle andbeing abutted against the card-retracting needle.

In an example embodiment, the card holder includes a card holder frame,a cover plate located at top of the card holder frame, and a waterproofcircle sleeved on a periphery of the cover plate, wherein the waterproofcircle on the periphery of the cover plate and the slot form a sealingstructure therebetween.

In an example embodiment, the card holder includes a card holder frame,a cover plate located at top of the card holder frame, a connectingportion located between the card holder frame and the cover plate, and awaterproof circle sleeved on a periphery of the connecting portion,wherein the waterproof circle outside the connecting portion and theslot form a sealing structure therebetween.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides ametal casing, including a frame portion, a slot penetrating through theframe portion, and a sleeve integrated with an inner side of the frameportion. A card holder for an electric card is to be inserted throughthe slot. The sleeve is hollow to form a through-hole penetratingthrough the frame portion. A waterproof mechanism is mounted in thesleeve, and the waterproof mechanism includes a first end portionlimited to be inside the sleeve, a second end portion having an outerdiameter smaller than that of the first end portion, and a waterproofring located on a periphery of the first end portion. The waterproofring and an inner wall of the sleeve form a sliding sealing structure.The waterproof mechanism is movable by being pushed in an extendingdirection of the sleeve. The sleeve includes a sleeve body, a firstopening and a second opening, the first opening and the second openingbeing disposed at two ends of the sleeve body, respectively. The firstend portion is limited to be only movable within a stroke between thefirst opening and the second opening, and the second end portion iscapable of passing through the first opening to be in contact with acard retracting mechanism.

In an example embodiment, the first opening has an inner diametersmaller than an outer diameter of the first end portion.

In an example embodiment, a first blocking slope is formed at a junctionbetween the first end portion and the second end portion, and a secondblocking slope, corresponding to and cooperating with the first blockingslope, is formed on a side of the first opening facing the secondopening.

In an example embodiment, a recess is formed in an outer end of thefirst end portion for position fixing of a card-retracting needle andbeing abutted against the card-retracting needle.

In an example embodiment, the card holder includes a card holder frame,a cover plate located at top of the card holder frame, and a waterproofcircle sleeved on a periphery of the cover plate, wherein the waterproofcircle on the periphery of the cover plate and the slot form a sealingstructure therebetween.

In an example embodiment, the waterproof mechanism is inserted from thesecond opening of the sleeve, and once the sleeve is inserted, anopen-ring metal elastic member having an inner diameter smaller than anouter diameter of the first end portion is clipped in the secondopening, or the second opening is stamped in such a manner that theinner diameter of the second opening becomes smaller and is smaller thanthe outer diameter of the first end portion.

In an example embodiment, the waterproof mechanism is inserted from thesecond opening of the sleeve, and once the sleeve is inserted, a side ofthe sleeve close to the second opening is pressed towards a circlecenter to form a position limiting ring having an inner diameter smallerthan the outer diameter of the first end portion.

In an example embodiment, the second opening has an inner diametersmaller than an outer diameter of the first end portion, the waterproofmechanism is inserted from the first opening of the sleeve, and once thesleeve is inserted, the first opening of the sleeve is pressed towards acircle center in such a manner that an inner diameter of the firstopening becomes smaller and is smaller than the outer diameter of thefirst end portion.

In an example embodiment, the second opening has an inner diametersmaller than an outer diameter of the first end portion, the waterproofmechanism is inserted from the first opening of the sleeve, and once thesleeve is inserted, an open-ring metal elastic member having an innerdiameter smaller than an outer diameter of the first end portion isriveted in the first opening.

In order to solve the above technical problem, the present disclosureprovides another technical solution. The present disclosure provides amobile terminal, including the metal casing described above.

In the waterproof card holder, the card seat, and the mobile terminalaccording to the present disclosure, the sleeve is provided tointegrally extend from the through-hole of the cover plate of the cardholder towards the card seat, and the waterproof mechanism is disposedwithin the sleeve and forms a sealing structure together with thesleeve, so that the card retraction and waterproof property can beachieved at the same time through movement of the waterproof mechanism.

In the metal casing, and the mobile terminal according to the presentdisclosure, the sleeve integrated with and extending from an inner sideof the frame portion is provided, and the waterproof mechanism isdisposed within the sleeve and forms a sealing structure together withthe sleeve, so that the card retraction and waterproof property can beachieved at the same time through movement of the waterproof mechanism.

BRIEF DESCRIPTION OF DRAWINGS

The accompanying drawings described herein are intended to provide afurther understanding of the present disclosure, and belong to a part ofthe present disclosure. The illustrative embodiments of the presentdisclosure and description thereof aim to explain the presentdisclosure, instead of constituting an undue limitation of the presentdisclosure.

FIG. 1 to FIG. 4 are schematic diagrams of a waterproof card seataccording to Embodiment 1 of the present disclosure, FIG. 5 to FIG. 8are schematic diagrams of a metal casing according to Embodiment 2 ofthe present disclosure, FIG. 9 to FIG. 12 are schematic diagrams of awaterproof card seat according to Embodiment 3 of the presentdisclosure, and FIG. 13 to FIG. 16 are schematic diagrams of a metalcasing according to Embodiment 4 of the present disclosure.

FIG. 1 is a perspective assembled diagram of a waterproof card seataccording to the present disclosure;

FIG. 2 is a perspective diagram of a card holder and waterproof membersof a waterproof card seat according to the present disclosure;

FIG. 3 is a cross-sectional view taken along a dashed line A-A shown inFIG. 1 according to the present disclosure;

FIG. 4 is a partial enlarged view of a dashed circle shown in FIG. 3according to the present disclosure;

FIG. 5 is a perspective diagram of a metal casing fitted in a waterproofcard seat according to the present disclosure;

FIG. 6 is a cross-sectional view taken along a dashed line B-B shown inFIG. 5;

FIG. 7 is an exploded view of a metal casing, a card holder, and awaterproof mechanism according to the present disclosure;

FIG. 8 is a partial enlarged view of a dashed circle shown in FIG. 7;

FIG. 9 is a perspective assembled diagram of a waterproof card seataccording to the present disclosure;

FIG. 10 is a perspective diagram of a waterproof mechanism of awaterproof card seat according to the present disclosure;

FIG. 11 is a perspective diagram of a card holder and a waterproofmechanism of a waterproof card seat according to the present disclosure;

FIG. 12 is a partial enlarged view of a dashed circle shown FIG. 11according to the present disclosure;

FIG. 13 is a perspective diagram of a metal casing fitted in awaterproof card seat according to the present disclosure;

FIG. 14 is a cross-sectional view of the metal casing taken along adashed line B-B shown in FIG. 13 according to the present disclosure;

FIG. 15 is an exploded view of a metal casing, a card holder, and awaterproof mechanism according to the present disclosure; and

FIG. 16 is a cross-sectional view of the metal casing and the waterproofmechanism taken along the dashed line B-B shown in FIG. 13 according tothe present disclosure.

DESCRIPTION OF EMBODIMENTS

In order to clarify the purposes, technical solutions, and advantages ofthe present disclosure, the technical solutions of the presentdisclosure will be clearly and fully described with reference tospecific embodiments and accompanying drawings of the presentdisclosure. It is apparent that the described embodiments are only apart of the embodiments of the present disclosure, rather than all ofthem. All other embodiments, which are obtained by those skilled in theart based on the disclosed embodiments of the present disclosure withoutdeparting from the inventive scope, shall fall within the scope of thepresent disclosure.

Embodiment 1

Referring to FIG. 1 to FIG. 4, a waterproof card seat according to thepresent disclosure includes a terminal module (not shown), a metalcasing 11, a card retracting mechanism 12, a card holder 13, and awaterproof mechanism 20. The card holder 13 is configured to carry anelectronic card and move between the metal casing 11 and the terminalmodule. The card retracting mechanism 12 includes a push rod 121 mountedon a lateral side of the card seat 10, and an end portion 122 of thepush rod 121 abuts against and fits into an end of the waterproofmechanism 20.

The card holder 13 according to the present disclosure includes a cardholder frame 131, a cover plate 132 located at the top of the cardholder frame 131, a connecting portion 134 located between the cardholder frame 131 and the cover plate 132, a waterproof circle 136sleeved on an outer periphery of the connecting portion 134 or the coverplate 132, a sleeve 135 integrated with and extending from an inner sideof the cover plate 132, and a through-hole 133 penetrating through thesleeve 135 and the cover plate 132.

The waterproof mechanism 20 includes a main body 25, a first end portion21 located inside the sleeve 135, a second end portion 22 protrudingfrom the sleeve 135, and a waterproof ring 23 located on a part of themain body 25 close to the first end portion 21. An outer diameter of themain body 25 is smaller than an inner diameter of the sleeve 135, anouter diameter of the second end portion 22 is greater than the innerdiameter of the sleeve 135, and an outer diameter of a part of the firstend portion 21 is equal to the inner diameter of the sleeve 135. Arecess 26 is formed in an outer end of the first end portion 21 to beabutted by a card-retracting needle (not shown). In a state when a cardis inserted, the main body 25 of the waterproof mechanism 20 iscompletely located within the sleeve 135, and the second end portion 22is blocked to be outside the sleeve 135.

A protrusion (not shown) is formed in an end surface of the second endportion 22, and a groove (not labeled) corresponding to the protrusionis provided in a surface of the end portion 122 of the push rod 121, soto achieve position fixing of the waterproof mechanism 20 and the pushrod 121, thereby preventing an applied force from being skewed.

The first end portion 21 of the waterproof mechanism 20 is inserted intothe sleeve 135 from an end of the sleeve 135 facing away from the coverplate 132, and the waterproof ring 23 sleeved on a periphery of the mainbody 25 and the inner wall of the sleeve 135 form a sealing structure.When it is needed to retract the card, a card-retracting needle (notshown) is inserted from the through-hole 133, so as to abut against therecess 26 of the waterproof mechanism 20 and push the waterproofmechanism 20 to move. The second end portion 22 of the moving waterproofmechanism 20 pushes the end portion 122 of the push rod 121 backwards tocomplete the card retraction. During this process, the waterproof ring23 at the periphery of the waterproof mechanism 20 and the inner wall ofthe sleeve 135 achieve sealing, preventing external water molecules fromentering the inside of the mobile terminal through the sleeve 135.

The card holder 13 or the cover plate 132 of the card holder 13 ismanufactured by a CNC process or a powder metallurgy process. In oneembodiment, the waterproof circle 136 is sleeved on the periphery of thecover plate 132 and achieves sealing with a slot 32 of the metal casing30.

In the card holder and the waterproof card seat according to the presentdisclosure, the sleeve 135 is provided to integrally extend from thethrough-hole 133 of the cover plate 132 of the card holder 13 towardsthe card seat, and the waterproof mechanism 20 is disposed within thesleeve 135 and forms a sealing structure with the sleeve 135, so thatthe card retraction and waterproof property can be achieved at the sametime through movement of the waterproof mechanism 20.

Embodiment 2

Referring to FIG. 5 to FIG. 8, compared with Embodiment 1, Embodiment 2mainly relates to a metal casing 30, such as a metal middle frame, ametal casing or the like for a mobile phone or a tablet computer. Themetal casing 30 includes a frame portion 31 and a slot 32 transverselypenetrating through the frame portion 31, and the card holder 13 is tobe inserted through the slot 32. The sleeve 33 according to Embodiment2, compared with that according to Embodiment 1, is integrated with aninner side of the frame portion 31 of the metal casing 30, and thethrough-hole 331 of the sleeve 33 penetrates through the frame portion31 and corresponds to the through-hole 133 on the side of the coverplate 13 of the card holder 13, so as to facilitate the insertion of thecard-retracting needle. In other embodiments, the cover plate 132 of thecard holder 13 may not be provided with the through-hole 133, and thethrough-hole 133 can be directly disposed at the outside of the frameportion 31. That is, the card-retracting needle is directly insertedfrom the outside of the frame portion 31 to push the first end portion21 to perform card retraction.

In the present embodiment, the waterproof circle 136 is disposed on theperiphery of the connecting portion 134 or the cover plate 132. Theoperation principle of the waterproof mechanism 20 is the same as thataccording to Embodiment 1, and will not be repeated within thedescription.

Embodiment 3

Referring to FIG. 9 to FIG. 12, the waterproof card seat according tothe present disclosure includes a terminal module (not shown), a metalcasing 11, a card retracting mechanism 12, a card holder 13, and awaterproof mechanism 20.

Compared with Embodiment 1, the card holder 13 according to the presentembodiment is integrated with and extends from the inner side of thecover plate 132 to form a sleeve 50 and a through-hole 55 penetratingthrough the sleeve 50 and the cover plate 132.

The sleeve 50 includes a sleeve body 53, a first opening 51 located atan inner side of the sleeve body 53, and a second opening 52 located atan outer side of the cover plate 132.

The waterproof mechanism 20 includes a first end portion 21 located inthe through-hole 55 of the sleeve 50, a second end portion 22 integratedwith and extending from an end of the first end portion 21 towards thecard retracting mechanism 12, and a waterproof ring 23 sleeved on theperiphery of the first end portion 21. An end surface of the first endportion 21 is recessed to form a recess 26 to prevent thecard-retracting needle from being skewed when contacting the first endportion 21. A protrusion 25 is formed in an end surface of the secondend portion 22, and a recess 125 corresponding to the protrusion 25 isformed at an end portion 122 of the push rod 121 of the card retractingmechanism 12 that contacts the second end portion 22, so as to preventdeflecting and slipping of the contact. An outer diameter of the firstend portion 21 is greater than an outer diameter of the second endportion 22, and a first blocking slope 24 is formed at a junctionbetween the first end portion 21 and the second end portion 22. Thefirst end portion 21 passes through the first opening 51 of the sleeve50 to be in contact with the push rod 121. The outer diameter of thefirst end portion 21 is not greater than an inner diameter of the sleevebody 53.

In an embodiment, the waterproof mechanism 20 is inserted from thesecond opening 52 of the sleeve 50, an inner diameter of the firstopening 51 is smaller than the outer diameter of the first end portion21 of the waterproof mechanism 20, and an inner diameter of the secondopening 52 is not smaller than the outer diameter of the first endportion 21 of the waterproof mechanism 20. After the waterproofmechanism 20 has been inserted into the sleeve 50, a second blockingslope 54 is formed on an inner side of the first opening 51 facingtowards the second opening 52 and cooperates with the first blockingslope 24 of the waterproof mechanism 20, so as to prevent the waterproofmechanism 20 from being further pushed. An open-ring metal elasticmember 40 is clipped in the second opening 52 to prevent the waterproofmechanism 20 from exiting from the second opening 52. In this situation,the open-ring metal elastic member 40 has an inner diameter smaller thanthe outer diameter of the first end portion 21 of the waterproofmechanism 20. Alternatively, the second opening 52 is subjected toanother stamping in such a manner that an edge portion of the secondopening 52 is pressed towards a circle center to form an inner diameterfor the second opening smaller than the outer diameter of the first endportion 21 of the waterproof mechanism 20. In this way, the waterproofmechanism 20 can be prevented from exiting from the second opening 52.

In another embodiment, the waterproof mechanism 20 is inserted from thefirst opening 51 of the sleeve 50, and the inner diameter of the secondopening 52 is smaller than the outer diameter of the first end portion21 of the waterproof mechanism 20, in order to prevent the waterproofmechanism 20 from exiting from the second opening 52. After thewaterproof mechanism 20 has been inserted from the first opening 51, theinner diameter of the first opening 51 is greater than the outerdiameter of the first end portion 21 of the waterproof mechanism 20. Inthis situation, an open-ring metal elastic member 40 is pressed in tolimit a position of the waterproof mechanism 20. At the same time, theopen-ring metal elastic member 40 is correspondingly provided with asecond blocking slope facing the first blocking slope 24. Alternatively,after the waterproof mechanism 20 has been inserted into the sleeve body53, the first opening 51 is pressed along a radial direction to make theinner diameter of the first opening 51 be smaller than the outerdiameter of the first end portion 21 of the waterproof mechanism 20.

In another embodiment, the waterproof mechanism 20 is inserted from thesecond opening 52 of the sleeve 50, the inner diameter of the firstopening 51 is smaller than the outer diameter of the first end portion21 of the waterproof mechanism 20, and the inner diameter of the secondopening 52 is not smaller than the outer diameter of the first endportion 21 of the waterproof mechanism 20. After the waterproofmechanism 20 has been inserted into the sleeve 50, a second blockingslope 54 is formed on an inner side of the first opening 51 facing thesecond opening 52 and cooperates with the first blocking slope 24 of thewaterproof mechanism 20, so as to prevent the waterproof mechanism 20from being further pushed. The sleeve body 53 is pressed towards thecircle center at a position close to the cover plate 132 to form alimiting ring 56, which has an inner diameter smaller than the outerdiameter of the first end portion 21 of the waterproof mechanism 20,thereby preventing the waterproof mechanism 20 from exiting from thesecond opening 52.

The waterproof ring 23 located outside the first end portion 21 of thewaterproof mechanism 20 and the inner wall of the sleeve body 53 of thesleeve 50 form a sealing structure. When it is needed to retract thecard, a card-retracting needle (not shown) is inserted from thethrough-hole 55 to abut against the recess 26 of the waterproofmechanism 20 and thus push the waterproof mechanism 20 to move, and thesecond end portion 22 of the moving waterproof mechanism 20 pushes theend portion 122 of the push rod 121 backwards to complete the cardretraction. During this process, the waterproof ring 23 at the peripheryof the waterproof mechanism 20 and the inner wall of the sleeve body 53achieve sealing, preventing external water molecules from entering theinside of the mobile terminal through the sleeve 50.

The card holder 13 or the cover plate 132 of the card holder 13 ismanufactured by a CNC process or a powder metallurgy process. InEmbodiment 3, the waterproof circle 136 is sleeved on the periphery ofthe cover plate 132 and achieves sealing with a slot 32 of the metalcasing 30.

In the card holder and the waterproof card seat according to the presentdisclosure, the sleeve 50 is provided to integrally extend from thethrough-hole 55 of the cover plate 132 of the card holder 13 towards thecard seat, and the waterproof mechanism 20 is disposed within the sleeve50 and forms a sealing structure with the sleeve 50, so that the cardretraction and waterproof property can be achieved at the same timethrough movement of the waterproof mechanism 20.

Embodiment 4

Referring to FIG. 13 to FIG. 16, compared with Embodiment 3, Embodiment4 mainly relates to a metal casing 30, such as a metal middle frame, ametal casing, or the like for a mobile phone or a tablet computer. Themetal casing 30 includes a frame portion 31, and a slot 32 transverselypenetrating through the frame portion 31, and the card holder 13 is tobe inserted through the slot 32. The sleeve 50 according Embodiment 4,compared with that according to Embodiment 3, is integrated with on aninner side of the frame portion 31 of the metal casing 30, and thethrough-hole 55 of the sleeve 50 penetrates through the frame portion 31to facilitate the insertion of the card-retracting needle.

In the present embodiment, the waterproof circle 136 may be disposed onthe periphery of the connecting portion 134 or the cover plate 132. Theoperation principle of the waterproof mechanism 20 is the same as thataccording to Embodiment 3, and will not be repeated herein.

It should be understood that the terms “comprise”, “include” or anyother variants are intended to encompass a non-exclusive inclusion, suchthat a process, a method, a product, or an apparatus also includesdescribed as including a series of element also includes other elementsthat are not explicitly listed, or elements that are inherent to such aprocess, method, product, or apparatus. Without any further limitations,the process, method, product, or apparatus defined by the expression“comprising an element” or “including an element” does not exclude thepresence of other equivalent elements.

The above description is a part of embodiments of the presentdisclosure, rather than limit the scope of the present disclosure. Thoseskilled in the art understand that the technical solutions of the aboveembodiments can be modified. Any modification, equivalent substitution,or improvement made without departing from the spirit and principle ofthe present disclosure shall fall within the protection scope defined bythe claims.

What is claimed is:
 1. A waterproof card holder, comprising: a cardholder frame; a cover plate located at a top of the card holder frame; asleeve integrated with and extending from an inner side of the coverplate, including a through-hole penetrating through the sleeve and thecover plate, wherein the sleeve comprises a sleeve body, a first openingand a second opening, the first opening and the second opening beingdisposed at two ends of the sleeve body, respectively; and a waterproofmechanism accommodated in the sleeve, wherein the waterproof mechanismcomprises a first end portion limited to be inside the sleeve, a secondend portion having an outer diameter smaller than that of the first endportion, and a waterproof ring sleeved on a periphery of the first endportion, wherein the waterproof ring and the sleeve form a slidingsealing structure therebetween, the first end portion is limited to beonly movable within a stroke between the first opening and the secondopening, and the second end portion is capable of passing through thefirst opening to be in contact with a card retracting mechanism.
 2. Thewaterproof card holder according to claim 1, comprising a waterproofcircle disposed on a periphery of the cover plate, wherein thewaterproof circle and an inner side wall of a slot of a metal casingform a sealing structure.
 3. The waterproof card holder according toclaim 2, wherein the first opening has an inner diameter smaller than anouter diameter of the first end portion.
 4. The waterproof card holderaccording to claim 3, wherein a first blocking slope is formed at ajunction between the first end portion and the second end portion; and asecond blocking slope, corresponding to and cooperating with the firstblocking slope, is formed on a side of the first opening facing thesecond opening.
 5. The waterproof card holder according to claim 1,wherein the waterproof mechanism is inserted from the second opening ofthe sleeve, and once the waterproof mechanism is inserted, an open-ringmetal elastic member having an inner diameter smaller than an outerdiameter of the first end portion is clipped in the second opening, orthe second opening is stamped in such a manner that the inner diameterof the second opening becomes smaller and is smaller than the outerdiameter of the first end portion.
 6. The waterproof card holderaccording to claim 1, wherein the second opening has an inner diametersmaller than an outer diameter of the first end portion; the waterproofmechanism is inserted from the first opening of the sleeve; and once thewaterproof mechanism is inserted, the first opening is pressed towards acircle center in such a manner that an inner diameter of the firstopening is smaller than the outer diameter of the first end portion. 7.The waterproof card holder according to claim 1, wherein the secondopening has an inner diameter smaller than an outer diameter of thefirst end portion; the waterproof mechanism is inserted from the firstopening of the sleeve; and once the waterproof mechanism is inserted, anopen-ring metal elastic member having an inner diameter smaller than anouter diameter of the first end portion is riveted in the first opening.8. A metal casing, comprising: a frame portion including a slotpenetrating through the frame portion; a sleeve integrated with an innerside of the frame portion wherein the sleeve is hollow to form athrough-hole penetrating through the frame portion; a waterproof cardholder for an electric card configured to be inserted through the slot;a waterproof mechanism accommodated in the sleeve, the waterproofmechanism comprising a first end portion limited to be inside thesleeve, a second end portion having an outer diameter smaller than thatof the first end portion, and a waterproof ring located on a peripheryof the first end portion, wherein: the waterproof ring and an inner wallof the sleeve form a sliding sealing structure; the waterproof mechanismis movable by being pushed in an extending direction of the sleeve; thesleeve comprises a sleeve body, a first opening and a second opening;the first opening and the second opening are disposed at two ends of thesleeve body, respectively; the first end portion is limited to be onlymovable within a stroke between the first opening and the secondopening; and the second end portion is capable of passing through thefirst opening to be in contact with a card retracting mechanism.
 9. Themetal casing according to claim 8, wherein the first opening has aninner diameter smaller than an outer diameter of the first end portion.10. The metal casing according to claim 9, wherein a first blockingslope is formed at a junction between the first end portion and thesecond end portion, and a second blocking slope, corresponding to andcooperating with the first blocking slope, is formed on a side of thefirst opening facing the second opening.
 11. The metal casing accordingto claim 9, wherein a recess is formed in an outer end of the first endportion for position fixing of a card-retracting needle and beingabutted against the card-retracting needle.
 12. The metal casingaccording to claim 8, wherein the waterproof card holder comprises acard holder frame, a cover plate located at top of the card holderframe, and a waterproof circle sleeved on a periphery of the coverplate, wherein the waterproof circle on the periphery of the cover plateand the slot form a sealing structure therebetween.
 13. The metal casingaccording to claim 8, wherein, the waterproof mechanism is inserted fromthe second opening of the sleeve, and once the sleeve is inserted, anopen-ring metal elastic member having an inner diameter smaller than anouter diameter of the first end portion is clipped in the secondopening, or the second opening is stamped in such a manner that theinner diameter of the second opening becomes smaller and is smaller thanthe outer diameter of the first end portion.
 14. The metal casingaccording to claim 8, wherein the waterproof mechanism is inserted fromthe second opening of the sleeve, and once the sleeve is inserted, aside of the sleeve close to the second opening is pressed towards acircle center to form a position limiting ring having an inner diametersmaller than the outer diameter of the first end portion.
 15. The metalcasing according to claim 8, wherein the second opening has an innerdiameter smaller than an outer diameter of the first end portion, thewaterproof mechanism is inserted from the first opening of the sleeve,and once the sleeve is inserted, the first opening of the sleeve ispressed towards a circle center in such a manner that an inner diameterof the first opening becomes smaller and is smaller than the outerdiameter of the first end portion.
 16. The metal casing according toclaim 8, wherein the second opening has an inner diameter smaller thanan outer diameter of the first end portion, the waterproof mechanism isinserted from the first opening of the sleeve, and once the sleeve isinserted, an open-ring metal elastic member having an inner diametersmaller than an outer diameter of the first end portion is riveted inthe first opening.